APA (7th ed.) Citation

Gray, H. J., & Isaacs, A. (1991). Dictionary of physics (3rd ed.). Longman.

Chicago Style (17th ed.) Citation

Gray, H. J., and Alan Isaacs. Dictionary of Physics. 3rd ed. Harlow, Eng.: Longman, 1991.

MLA (9th ed.) Citation

Gray, H. J., and Alan Isaacs. Dictionary of Physics. 3rd ed. Longman, 1991.